Evaluation of Cerenkov Converters for Measuring Current Density Distribution in Large-Area Electron BEAMS

摘要

An evaluation is presented of several types of Cerenkov converters to study time resolved current uniformity in large-area electron beams with current densities up to 4 kA/cm sup 2 . The materials used for this study were Mylar, fused silica, glass, and Lucite. The final choice for a Cerenkov converter to be used on a large-area diode was type 0080 clear lime glass, which is a commercial plate glass. The thickness used was 0.32 cm. The glass converter showed excellent time response and correlation of light output to electron current density. This converter survives in intense current beams and is economically available in large sizes. (ERA citation 12:018958)